Managing SCell Interruptions via Measurement Cycle Configuration
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Solution Overview
Problem
Carrier aggregation in wireless devices leads to interruptions in serving cell performance when performing measurements on secondary component carriers (SCCs) due to the activation and deactivation of secondary cells, causing glitches and packet loss, especially when multiple SCCs are involved, and existing solutions do not effectively manage these interruptions for devices configured with multiple SCells.
Innovation Solution
A method and system that manage serving cell performance by specifying wireless device behavior and network node procedures to ensure minimum performance metrics are met during measurements on SCCs with deactivated SCells, allowing for the configuration of measurement cycles and periodicity to minimize interruptions and maintain effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurements are performed on SCCs with deactivated SCells, then measurement capability is improved, but serving cell performance deteriorates due to interruptions and packet loss
Solution Approach 1:
The patent applies preliminary action by configuring measurement cycles and periodicity in advance for deactivated SCells. The network node pre-establishes measurement opportunities during which the wireless device can perform measurements on SCCs without causing continuous interruptions to serving cell performance. This allows measurement capability to be maintained while minimizing impact on active communications.
Solution Approach 2:
The patent implements periodic action through configured measurement cycles with specific periodicity. Instead of continuous measurements that would constantly interrupt serving cell operations, the wireless device performs measurements at periodic intervals defined by the measurement cycle configuration. This periodic approach allows the system to balance measurement needs with maintaining reliable serving cell performance.
2Device complexity
If multiple SCells are deactivated for measurement, then device complexity is reduced, but interruption management becomes more difficult
Solution Approach 1:
The patent applies segmentation by dividing the management of multiple deactivated SCells into individual measurement cycles. Each SCell can have its own measurement cycle configuration, allowing the network node to control and manage interruptions from each SCell separately. This segmented approach simplifies the overall management complexity by breaking down the multi-SCell measurement problem into manageable individual components.
Solution Approach 2:
The patent implements dynamics by allowing flexible configuration of measurement cycles and periodicity for different SCells. The network node can dynamically adjust measurement parameters based on current network conditions and priorities. This dynamic configuration enables efficient interruption management across multiple deactivated SCells while maintaining adaptability to changing operational requirements.
3Quantity of substance
If measurement cycles are configured for multiple SCCs, then measurement coverage is improved, but serving cell interruptions increase
Solution Approach 1:
The patent applies merging by combining multiple measurement cycles into a coordinated schedule. The network node configures measurement cycles for multiple SCCs such that measurements are performed in a consolidated manner rather than independently. This merging of measurement activities reduces the total number of separate interruptions to the serving cell while maintaining comprehensive measurement coverage across all configured SCCs.
Solution Approach 2:
The patent uses periodic action with configured measurement cycle periodicity to control the timing and frequency of measurements on multiple SCCs. By setting appropriate periodicity values, the system ensures that measurements are performed at regular intervals that balance measurement coverage requirements with minimizing interruptions to serving cell operations. The periodic structure allows predictable management of measurement-related interruptions.
Data Source
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AI summary
A wireless device and a method for a wireless device served by a first network node on a primary cell(PCell)is provided. The wireless device is capable of using at least two secondary serving cells (SCells). A first request to perform a measurement on at least one cell on a first secondary component carrier(SCC)with a deactivated first SCell using at least a first measurement cycle is received. A second request to perform a measurement on at least one cell on a second SCC with a deactivated second SCell using at least a second measurement cycle is received. An effective serving cell interruption probability (Peff) of missed at least one of Acknowledgement and Negative-Acknowledgement signaling in an uplink direction is determined based on at least the first measurement cycle and the second measurement cycle. A serving cell interruption probability is ensured to not exceed the determined Peff.